In my opinion the Mackinaw vests fits very nicely, but I guess boxy would be descriptive aswell. I have one in black/gray plaid and also a khaki poplin (?) hunting vest (which however is on the too large side). Furthermore, I got a Mackinaw jacket, but I have yet to try it on, as it was shipped to my parents place. All in all, love filson, and would own alot more if I didnt have to order from the US... On the pick up list is some dry Tin pants, and some kind of hat.